Improvement in end-thrust bearings



@.PBRLEY. BNDTHRUST BEARING.

No. 37,765.` P ate'imd P61124, 1863.

UNITED .STATES PMENTl QFFICE.

CHARLES PERLEY, OF NEW YORK, N. Y.` I

IMPROVEMENT IN END-THRUST BEARINGS.

Specicati-on forming part of Letters Patent No. 37,765, dated February 24, 1863.

To all whom it may concern:

l13e it known that I, CHARLES PEaLEY, .of the city and State of New York,have invented and made a certain new and useful Improvement in-Bearingsfor Propeller-Shafts; and I do hereby declare that the following is a full, clear, and exact description of my said invention,ref erence being had to thev annexed drawings, making part of thisspecilication, where- Figure 1 is a vertical section of a propellershaft with my improved bearings, and Fig. 2 isa plan of the same with the cap of one of the bearings removed. l

Similarmarks ofreference indicate thesame arts.

p The nature of my said invention relates to the employment ot' balls betweenthe propellershaft and the bearings or journal-boxes .in such a manner that the end-thrnston the shaft from the action of the propeller in the water is taken upon balls.

It is.well known that the journal-boxes of propeller-shafts often become heated, and the expansion caused thereby increases friction,

and the machinery has .to be stopped in order that such journals' may cool, and this often renders it likely that the vessel 'may drift or get into dangerous situations in consequence of such stoppage. The cause of heating in journal-boxes of propellers is generally from lack of oil between the parts. The constant of oil in consequence of the closec'ontact of the surfaces'is prevented.

- In the drawings, a is a propeller-shaft of s I any usual character, to one end of which the rotating power is applied 'in any usual 'manner by the crank b or otherwise, and the said shaft receives the propeller or paddle in any usual manner. o o. represent the journal boxes or bearings supporting this shaft at the desired places along its length. The shaft a is formed with semicircular grooves at the points for these bearings, ,as at e e, and the interior surfaces of the .bearing c c are formed with corresponding grooves. Within these grooves cast-steel or other suitable balls,a` are placed, and in order to completely till these grooves I provide screw-plugs, as atl l, by the removal of which said balls can be introduced after the caps c are secured in place.v These grooves land balls take the weight of the shaft, and 4would also receive the end-thrust, particularly with small sham. I- however prefer and use the collar d, formed with a concentric groove receiving, balls z t', and also the edge ot' a steel or other suitable ring, k,'setting against the side of the journal-box. The collar d is attached to the shaft by set-screws 2 2 or other suitable means, and the end-thrust ot' the propeller, as it acts in the water, is taken upon the rolling balls z' i, whereby the friction is relieved and oil suppliedvinto the annular chamber con! taining said balls by a suitable fountain is conveyed with the balls to all the surface exposed to the rolling friction.

By my aforesaid improved bearings much friction isavoided, the heating of journals is prevented, and the propeller rendered much more etllcient.

What I claim, 'and desire to secure by Letl ters Patent, isl The collar d and balls z' e', arranged and applied as set forth, to take the end-thrust of the propeller-shat`t, as specified. In witness whereof I have hereunto set my signature this 13th day of February, 1862.

LEMUEL W SERRELL 7 Taos. GEO. HAROLD.

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